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Volume 40 (2016): Issue 1 (December 2016)

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Volume 30 (2014): Issue 1 (June 2014)

Volume 29 (2014): Issue 1 (March 2014)

Volume 27 (2014): Issue 1 (February 2014)

Volume 26 (2013): Issue 1 (June 2013)

Volume 25 (2013): Issue 1 (March 2013)

Volume 24 (2012): Issue 1 (December 2012)

Volume 23 (2012): Issue 1 (September 2012)

Volume 22 (2012): Issue 1 (June 2012)

Volume 21 (2012): Issue 1 (March 2012)

Volume 20 (2012): Issue 1 (January 2012)

Volume 14-15 (2010): Issue 2010 (December 2010)

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Volume 8 (2008): Issue 1 (December 2008)

Volume 7 (2008): Issue 4 (December 2008)

Volume 6 (2008): Issue 3 (September 2008)

Volume 5 (2008): Issue 2 (June 2008)

Volume 4 (2008): Issue 1 (March 2008)

Volume 3 (2007): Issue 2007 (January 2007)

Journal Details
Format
Journal
eISSN
2083-4608
ISSN
1895-8281
First Published
26 Feb 2008
Publication timeframe
4 times per year
Languages
English

Search

Volume 8 (2008): Issue 1 (December 2008)

Journal Details
Format
Journal
eISSN
2083-4608
ISSN
1895-8281
First Published
26 Feb 2008
Publication timeframe
4 times per year
Languages
English

Search

24 Articles
Open Access

Parametric Analysis of Hydrodynamic Forces During Berthing Operations

Published Online: 18 May 2009
Page range: 7 - 16

Abstract

Parametric Analysis of Hydrodynamic Forces During Berthing Operations

Prediction of hydrodynamic forces induced during self-berthing is the most important problem in modelling ship - berth interactions. The paper presents the parametric analysis of these forces, performed using the results of open water model tests and proposed regression models. The study allowed to quantify the importance of examined parameters, necessary in the development of the completed model of interaction forces with aim of its further application in the simulation model of ship manoeuvring motions.

Keywords

  • hydrodynamic forces
  • modelling
  • ship berthing
Open Access

Autonomous Materials Handling Robot for Advanced Manufacturing Applications

Published Online: 18 May 2009
Page range: 17 - 26

Abstract

Autonomous Materials Handling Robot for Advanced Manufacturing Applications

There is a need for mobile robots in reconfigurable manufacturing systems to reduce bottlenecks that occur in associated materials handling systems. These bottlenecks can occur as a result of the mass production of custom products. The project has focused on researching, designing, assembling, testing and validating a two-wheeled autonomous materials handling robot for reconfigurable manufacturing systems. A Mechatronic engineering approach, (system integration), has been used for the project. The approach required a vehicle that was dynamically and statically stable while in operation. Research has been done to obtain the optimum control strategy for the purpose of keeping the robot balanced for variable load characteristics. A navigation system has been researched that will allow the vehicle to perform materials handling tasks necessary to reduce bottlenecks. A wireless communication system has also been incorporated into the infrastructure of the vehicle. Performance analysis and testing in a reconfigurable production environment proves the viability of the materials handling system. This involves vehicle scheduling and routing while performing materials handling tasks.

Keywords

  • Manufacturing
  • Materials handling
  • Robotics
Open Access

An Artificial Vision-Based Computer Interface

Published Online: 18 May 2009
Page range: 27 - 34

Abstract

An Artificial Vision-Based Computer Interface

An application has been developed to assist in using software applications to individuals that have null or limited mobility of their upper limbs. The system uses a Web camera for movement patterns recognition of the user's face. The image analysis allows emulating the basic functions of the computer mouse. The face detection process is carried out through the implementation of an algorithm that uses a cascade sort key of Haar-Like type. The application was developed in C++ to be used on Windows XP platform. Tryout of the application has been performed showing excellent acceptation and short time training requirements.

Keywords

  • artificial vision
  • mouse
  • disability
  • handicapped
Open Access

Monte Carlo Method of Ship's Underkeel Clearance Evaluation for Safety of Ferry Approaching to Ystad Port Determination

Published Online: 18 May 2009
Page range: 35 - 44

Abstract

Monte Carlo Method of Ship's Underkeel Clearance Evaluation for Safety of Ferry Approaching to Ystad Port Determination

The paper is concerned with the analysis of simulation research results of newly design Piast ferry entering to modernized Ystad Port. The ship simulation model is described. After execution of real time simulations the Monte Carlo method of underkeel clearance evaluation is applied to asses the probability of ferry touching the bottom. The results could be used in risk assessment of ships entering to the ports.

Keywords

  • Ship's simulation model
  • Monte Carlo method
  • underkeel clearance
Open Access

Reliability Analysis of Two-State Consecutive "M out of L:F"-Series Systems

Published Online: 18 May 2009
Page range: 45 - 52

Abstract

Reliability Analysis of Two-State Consecutive "<italic>M</italic> out of <italic>L</italic>:F"-Series Systems

A non-stationary approach to reliability analysis of two-state series and consecutive "m out of k: F" systems is presented. Further, the consecutive "m out of k: F"- series system is defined and the recurrent formulae for its reliability function evaluation are proposed.

Keywords

  • series systems
  • consecutive " out of : F" systems
Open Access

Determination of Dynamic Under Keel Clearance of Maneuvering Ship

Published Online: 18 May 2009
Page range: 53 - 60

Abstract

Determination of Dynamic Under Keel Clearance of Maneuvering Ship

The safety of navigation of a ship manoeuvring within port waters mainly depends on its under keel clearance (UKC). Mainly UKC depends on water level change, squatting of moving ship and heeling and wave response. The effect of these components will be determined currently than such UKC is called as dynamic under keel clearance. The paper presents an analysis of certain components of UKC to maximise of ship draft and thus to achieve the economic benefit to port and ships owner.

Keywords

  • safety of navigation
  • under keel clearance
Open Access

Statistical Analysis of Reliability Field Data when Working Conditions are Imprecisely Reported

Published Online: 18 May 2009
Page range: 61 - 68

Abstract

Statistical Analysis of Reliability Field Data when Working Conditions are Imprecisely Reported

In contrast to laboratory lifetime tests reliability field tests are usually performed in conditions which vary in time in a random way. We consider the case when users are asked about their description of their vague perceptions of the usage conditions. In the paper we use interval-valued variables for the description of imprecisely known test conditions that may be used as covariates in classical reliability models. We present a simple approximate algorithm for a proportional hazard lifetime model.

Keywords

  • field reliability data
  • interval-valued data
  • proportional hazard
Open Access

Analysis of Simulation Visualizations of Shipš Traffic

Published Online: 18 May 2009
Page range: 69 - 76

Abstract

Analysis of Simulation Visualizations of Shipš Traffic

In the article the problem of comparison and compatibility of the results of simulation research have been conducted on various simulators of ship's traffic with two different methods of visualization (types of visualizations) is being examined. In both cases the similar mathematical model of ships' traffic has been applied which had been verified by the methods used in marine traffic engineering. The research have been conducting on the new designed LNG terminal in Świnoujście.

Keywords

  • visualization
  • LNG
  • traffic lane
Open Access

Development of an Integrated Framework for Assessing and Improving the Performance of Manufacturing Industries in Developing Countries

Published Online: 18 May 2009
Page range: 77 - 92

Abstract

Development of an Integrated Framework for Assessing and Improving the Performance of Manufacturing Industries in Developing Countries

In developing countries, there is an overwhelming challenge to diversify the economy from the primary sectors to more value adding and income generating sustainable secondary or manufacturing sectors. As global competitiveness intensifies, it is imperative that manufacturing organizations in developing countries can compete at a global level. This research focuses on Trinidad and Tobago (T&T) and the wider Caribbean region. However, its applicability and relevance is extensive. This paper investigates the manufacturing techniques/practices currently implemented in T&T with focus on companies that are compliant with quality and health and safety policies. This study advocates the need for a strategic approach for the successful implementation of world-class manufacturing (WCM) techniques/practices in T&T manufacturing industry. The methodology as well as research instruments developed and used are presented.

Keywords

  • Manufacturing Performance
  • World-class Manufacturing
  • Trinidad and Tobago
  • Health and Safety
  • ISO 9000
Open Access

Entomopter Maneuverability Exchanged by Deformations Control of Flexible Flapping Wings

Published Online: 18 May 2009
Page range: 93 - 102

Abstract

Entomopter Maneuverability Exchanged by Deformations Control of Flexible Flapping Wings

In the background of preparing this paper lies our believe that transferring ideas from the more matured disciple like aircraft technology to emerging animal technology should be beneficial for the later one and vice-versa. One integrated idea, of special interest to both disciplines, is the active flexible wing concept. In this paper we developed aeroelastic analysis for a flexible wing for an imposed harmonic flapping motion about the root chord of the wing. A Matlab code was written based on the analysis. This code was used to find the average lift and thrust of a wing of known aerodynamic and structural properties.

Keywords

  • Flapping wings Micro Aerial Vehicles (MAV)
  • aeroelastic analysis
  • Entomopter flight dynamics and control
Open Access

Engineering System Reliability State Identification Methodology

Published Online: 18 May 2009
Page range: 103 - 112

Abstract

Engineering System Reliability State Identification Methodology

In the process of investigating physical aspects of failures there is a need for measuring various features of objects. For this purpose measuring system, which consists of: operator - measuring instrument was used. In the paper an attempt of determining affectivity of such system was done. Influence of the first and second type errors on affectivity of the measuring system was considered. It was also shown how to decrease these errors. Influence on the affectivity of the reliability measurement of the measuring instrument was analyzed. Graduate and immediate failures were considered. Then some final conclusions were formulated.

Keywords

  • identification of the system technical state
  • reliability
  • measurement errors
Open Access

Automated Guided Vehicles (AGV): Searching a Path in the Flexible Manufacturing Systems

Published Online: 18 May 2009
Page range: 113 - 124

Abstract

Automated Guided Vehicles (AGV): Searching a Path in the Flexible Manufacturing Systems

Manufacturing systems are undergoing a noticeable evolution due to an intense technological progress in industrial robotics. Serial production has evolved into the concept of Flexible Manufacturing Systems (FMS), which encapsulate processes in automatic equipment that are capable of executing different operations, that before be performed in several stages and diverse equipments. Automated Guided Vehicle (AGV) systems have been frequently used as material handling equipment in manufacturing systems since the last two decades. Particularly, AGV's with trailers are, and will continue to be, the backbone of the material transport industry. The use of these systems has taken the attention of experts and researchers. They are numerous studies concerning AGV with trailers systems in literature; few of them deal with the adaptation of these systems into FMS. In this paper, a study of the trajectories and a simulation model of a hypothetical system, which included a FMS environment, were developed. In addition, a potential field's method was explored in order to improve the ability of detecting obstacles in AGV's with trailers moving through stations.

Keywords

  • Flexible Manufacturing Systems
  • Automated Guided Vehicle
  • Trajectories Planning
Open Access

Chosen Problems of Road Accidents Analyses in Poland

Published Online: 18 May 2009
Page range: 125 - 134

Abstract

Chosen Problems of Road Accidents Analyses in Poland

This article offers classification of car collisions from the point of view of the most frequent accidents and crash tests. The most important problems are the consequences of incomplete control of a car. The article focuses on the safety of road traffic in Poland and presents an attempt to analyze the causes of most frequent collisions and their consequences. It gives statistical data and attempts to analyze the level of road traffic safety. Some important indicators are shown here to compare the situation in France and Poland, which enabled verification of some opinions about road traffic safety in Poland.

Keywords

  • road accident
  • safety
  • statistical data
Open Access

Design of Reconfigurable Machine Systems: Knowledge Based Approach

Published Online: 18 May 2009
Page range: 135 - 144

Abstract

Design of Reconfigurable Machine Systems: Knowledge Based Approach

The Reconfigurable Manufacturing System (RMS) offers a flexible, changeable and dynamic manufacturing platform which is complex. The RMS evolved from the necessity to satisfy the markets highly customised demands. As the requirements of the customers vary the manufacturing system will need continuous and timely reconfigurations. A Knowledge Based System (KBS) is therefore the critical link in the module selection from a database to configure a machine. Modules will be selected to be timeously assembled into machine tools to manufacture customised goods with minimal disruptions to satisfy customer delivery times.

This paper will review the issues surrounding KBS software and their characteristics, as the appropriateness and requisite for establishing an RMS knowledge based system application is explored. Basic machine tree structures for the KBS application are also presented and discussed.

Keywords

  • Knowledge Based Systems
  • Reconfigurable Machine Tool
Open Access

Knowledge-Based Collaborative Lean Manufacturing Management (KBCLMM) System

Published Online: 18 May 2009
Page range: 145 - 156

Abstract

Knowledge-Based Collaborative Lean Manufacturing Management (KBCLMM) System

The objective of this research paper is to demonstrate the application of hybrid Knowledge-Based System, Gauging Absences of Pre-Requisites (GAP), and Analytic Hierarchy Process (AHP) approaches for selecting the improvement programs for Collaborative Lean Manufacturing Management (CLMM) System. In this research, a generic Knowledge-Based System is developed to measure the level of CLMM adoption in automotive manufacturers compared to the ideal system. Using the embedded GAP and AHP technique, the key lean manufacturing improvement programs can be prioritised by using both qualitative and quantitative criteria. The analysis covers the planning stage of the KBCLMM. The utilisation of the approach is demonstrated with an illustrative example.

Keywords

  • Analytic Hierarchy Process (AHP)
  • lean manufacturing
  • Knowledge-Based System (KBS)
  • Gauging Absences of Pre-Requisites (GAP)
Open Access

Preventive Maintenance with Imperfect Repairs of a System with Redundant Objects

Published Online: 18 May 2009
Page range: 157 - 170

Abstract

Preventive Maintenance with Imperfect Repairs of a System with Redundant Objects

An object ability to realise tasks may be restored by repairing only failed components. This is called imperfect repair, as the object is not as good as new after such a repair. Preventive replacement is an example of imperfect repair as well. The advantage of such maintenance is that it enables controlling a reliability level of a system. Sets of objects' components that should be replaced are derived on a basis of statistical diagnosing with use of data about components failures. The acceptable level of a failure risk while executing transportation tasks has been taken as a criterion of choosing elements to be replaced. An algorithm of selecting components for preventive replacement has been developed. It was shown that a level of system reliability could be controlled by changing an order of a quintile function in coordination and a number of redundant objects. A computer simulation model of the system was used to illustrate derived dependencies.

Keywords

  • Preventive maintenance
  • imperfect repair
  • statistical diagnosis
  • redundancy
Open Access

The Man - Machine Type Systems Modeling Approach

Published Online: 18 May 2009
Page range: 171 - 188

Abstract

The Man - Machine Type Systems Modeling Approach

The subject of this paper deals with selected usable characteristics of man - machine systems described by the selected basic attributes. The paper is describing also major objectives of safety engineering, based on the system approach, understanding the structure of safety management system, including the human factor, and all interrelationships between the system components. The part of the paper is example of safety engineering implementations in practice.

Keywords

  • man-machine set
  • availability
  • safety
  • reliability
Open Access

Human Reliability Model

Published Online: 18 May 2009
Page range: 189 - 200

Abstract

Human Reliability Model

The paper is focusing on reliability model of transport devices' human operator. The presented operator model is base on operation potential approach, with taken into account his features and states helping assure of safety decision-making process. The human reliability model is important for future improvement the human - machine interfaces (HMI).

Keywords

  • Human
  • reliability
  • transportation
Open Access

The Effect of Sales Smoothing on Inventory Performance

Published Online: 18 May 2009
Page range: 201 - 210

Abstract

The Effect of Sales Smoothing on Inventory Performance

This paper outlines z transform methods used to describe control of an inventory system. It examines how the form of the sales smoothing function affects the performance and sensitivity of the system to smoothing transfer functions. Graphical output from the Simulink package used the equations developed for an AIOBPCS inventory system. The analysis using sensitivity functions illustrates the frequency range over which the system is sensitive to the sales smoothing. For practical exponential smoothing this sensitive frequency window is in the range of weekly variations. The results presented here illustrate that the control-theoretic models show how sensitive the inventory is to sales smoothing. Replacing the traditional moving average technique with one based on control theory results in much lower stockout.

Keywords

  • Vendor-Managed-Inventory
  • discrete-simulation
  • sales smoothing
  • sensitivity
Open Access

Dangerous Goods Transportation: New Technologies and Reducing of the Accidents

Published Online: 18 May 2009
Page range: 211 - 222

Abstract

Dangerous Goods Transportation: New Technologies and Reducing of the Accidents

This article examines types of modern technologies application possibilities in dangerous goods transportation. It is noted that the solution to transport technology problems is based on the improvement of technological supply, the rational usage of informational modeling methodology of the whole transportation process. The article points out the ways of reducing the risk of possible damage and probability of accident. The conditions of ensure safe transportation of dangerous goods, managing and minimising risk on carriage of such goods along the whole route are introduced. The aspects of mobile solution of transport are named in this paper too.

Keywords

  • dangerous goods
  • risk
  • transport
Open Access

Rbf Neural Networks for Function Approximation in Dynamic Modelling

Published Online: 18 May 2009
Page range: 223 - 232

Abstract

Rbf Neural Networks for Function Approximation in Dynamic Modelling

The paper demonstrates the comparison of Monte Carlo simulation algorithm with neural network enhancement in the reliability case study. With regard to process dynamics, we attempt to evaluate the tank system unreliability related to the initiative input parameters setting. The neural network is used in equation coefficients calculation, which is executed in each transient state. Due to the neural networks, for some of the initial component settings we can achieve the results of computation faster than in classical way of coefficients calculating and substituting into the equation.

Keywords

  • reliability
  • Monte Carlo
  • Radial Basis Function (RBF)
Open Access

Aging Processes as a Primary Aspect of Predicting Reliability and Life of Aeronautical Hardware

Published Online: 18 May 2009
Page range: 233 - 240

Abstract

Aging Processes as a Primary Aspect of Predicting Reliability and Life of Aeronautical Hardware

The forecasting of reliability and life of aeronautical hardware requires recognition of many and various destructive processes that deteriorate the health/maintenance status thereof. The aging of technical components of aircraft as an armament system proves of outstanding significance to reliability and safety of the whole system. The aging process is usually induced by many and various factors, just to mention mechanical, biological, climatic, or chemical ones. The aging is an irreversible process and considerably affects (i.e. Reduces) reliability and life of aeronautical equipment.

Keywords

  • aircraft
  • durability
  • reliability
Open Access

Assessment of the Level of Undesirable Actions of People Involved in Road Transport Systems and their Environments.

Published Online: 18 May 2009
Page range: 241 - 248

Abstract

Assessment of the Level of Undesirable Actions of People Involved in Road Transport Systems and their Environments.

Road transport systems are socio-technical systems of the type Human - Technical object- Environment <H-TO-E>. In these systems hazards can be caused by: the man C, the technical object OT, and influence of the environment on the technical object and people who are present in the system and its environment. The authors of the paper make an attempt to evaluate the level of threats resulting from intended or not intended actions of people situated in this environment.

Keywords

  • social engineering system
  • safety working
Open Access

Markov Model of the Transport Devices Exploitation Process

Published Online: 18 May 2009
Page range: 249 - 260

Abstract

Markov Model of the Transport Devices Exploitation Process

The article presents the model of transport means operation and maintenance process, realized within a system of urban bus transport. On the basis of identification of the investigated system and the realized in it process, a mathematical model of the operation and ensuring efficiency processes was built, assuming that models of these processes are homogenous Markov processes. On this bases an analysis of the considered controlled process had been made. All the considerations are presented on the example of a chosen real system of operation and maintenance of means of transport.

Keywords

  • transport system
  • exploitation process
24 Articles
Open Access

Parametric Analysis of Hydrodynamic Forces During Berthing Operations

Published Online: 18 May 2009
Page range: 7 - 16

Abstract

Parametric Analysis of Hydrodynamic Forces During Berthing Operations

Prediction of hydrodynamic forces induced during self-berthing is the most important problem in modelling ship - berth interactions. The paper presents the parametric analysis of these forces, performed using the results of open water model tests and proposed regression models. The study allowed to quantify the importance of examined parameters, necessary in the development of the completed model of interaction forces with aim of its further application in the simulation model of ship manoeuvring motions.

Keywords

  • hydrodynamic forces
  • modelling
  • ship berthing
Open Access

Autonomous Materials Handling Robot for Advanced Manufacturing Applications

Published Online: 18 May 2009
Page range: 17 - 26

Abstract

Autonomous Materials Handling Robot for Advanced Manufacturing Applications

There is a need for mobile robots in reconfigurable manufacturing systems to reduce bottlenecks that occur in associated materials handling systems. These bottlenecks can occur as a result of the mass production of custom products. The project has focused on researching, designing, assembling, testing and validating a two-wheeled autonomous materials handling robot for reconfigurable manufacturing systems. A Mechatronic engineering approach, (system integration), has been used for the project. The approach required a vehicle that was dynamically and statically stable while in operation. Research has been done to obtain the optimum control strategy for the purpose of keeping the robot balanced for variable load characteristics. A navigation system has been researched that will allow the vehicle to perform materials handling tasks necessary to reduce bottlenecks. A wireless communication system has also been incorporated into the infrastructure of the vehicle. Performance analysis and testing in a reconfigurable production environment proves the viability of the materials handling system. This involves vehicle scheduling and routing while performing materials handling tasks.

Keywords

  • Manufacturing
  • Materials handling
  • Robotics
Open Access

An Artificial Vision-Based Computer Interface

Published Online: 18 May 2009
Page range: 27 - 34

Abstract

An Artificial Vision-Based Computer Interface

An application has been developed to assist in using software applications to individuals that have null or limited mobility of their upper limbs. The system uses a Web camera for movement patterns recognition of the user's face. The image analysis allows emulating the basic functions of the computer mouse. The face detection process is carried out through the implementation of an algorithm that uses a cascade sort key of Haar-Like type. The application was developed in C++ to be used on Windows XP platform. Tryout of the application has been performed showing excellent acceptation and short time training requirements.

Keywords

  • artificial vision
  • mouse
  • disability
  • handicapped
Open Access

Monte Carlo Method of Ship's Underkeel Clearance Evaluation for Safety of Ferry Approaching to Ystad Port Determination

Published Online: 18 May 2009
Page range: 35 - 44

Abstract

Monte Carlo Method of Ship's Underkeel Clearance Evaluation for Safety of Ferry Approaching to Ystad Port Determination

The paper is concerned with the analysis of simulation research results of newly design Piast ferry entering to modernized Ystad Port. The ship simulation model is described. After execution of real time simulations the Monte Carlo method of underkeel clearance evaluation is applied to asses the probability of ferry touching the bottom. The results could be used in risk assessment of ships entering to the ports.

Keywords

  • Ship's simulation model
  • Monte Carlo method
  • underkeel clearance
Open Access

Reliability Analysis of Two-State Consecutive "M out of L:F"-Series Systems

Published Online: 18 May 2009
Page range: 45 - 52

Abstract

Reliability Analysis of Two-State Consecutive "<italic>M</italic> out of <italic>L</italic>:F"-Series Systems

A non-stationary approach to reliability analysis of two-state series and consecutive "m out of k: F" systems is presented. Further, the consecutive "m out of k: F"- series system is defined and the recurrent formulae for its reliability function evaluation are proposed.

Keywords

  • series systems
  • consecutive " out of : F" systems
Open Access

Determination of Dynamic Under Keel Clearance of Maneuvering Ship

Published Online: 18 May 2009
Page range: 53 - 60

Abstract

Determination of Dynamic Under Keel Clearance of Maneuvering Ship

The safety of navigation of a ship manoeuvring within port waters mainly depends on its under keel clearance (UKC). Mainly UKC depends on water level change, squatting of moving ship and heeling and wave response. The effect of these components will be determined currently than such UKC is called as dynamic under keel clearance. The paper presents an analysis of certain components of UKC to maximise of ship draft and thus to achieve the economic benefit to port and ships owner.

Keywords

  • safety of navigation
  • under keel clearance
Open Access

Statistical Analysis of Reliability Field Data when Working Conditions are Imprecisely Reported

Published Online: 18 May 2009
Page range: 61 - 68

Abstract

Statistical Analysis of Reliability Field Data when Working Conditions are Imprecisely Reported

In contrast to laboratory lifetime tests reliability field tests are usually performed in conditions which vary in time in a random way. We consider the case when users are asked about their description of their vague perceptions of the usage conditions. In the paper we use interval-valued variables for the description of imprecisely known test conditions that may be used as covariates in classical reliability models. We present a simple approximate algorithm for a proportional hazard lifetime model.

Keywords

  • field reliability data
  • interval-valued data
  • proportional hazard
Open Access

Analysis of Simulation Visualizations of Shipš Traffic

Published Online: 18 May 2009
Page range: 69 - 76

Abstract

Analysis of Simulation Visualizations of Shipš Traffic

In the article the problem of comparison and compatibility of the results of simulation research have been conducted on various simulators of ship's traffic with two different methods of visualization (types of visualizations) is being examined. In both cases the similar mathematical model of ships' traffic has been applied which had been verified by the methods used in marine traffic engineering. The research have been conducting on the new designed LNG terminal in Świnoujście.

Keywords

  • visualization
  • LNG
  • traffic lane
Open Access

Development of an Integrated Framework for Assessing and Improving the Performance of Manufacturing Industries in Developing Countries

Published Online: 18 May 2009
Page range: 77 - 92

Abstract

Development of an Integrated Framework for Assessing and Improving the Performance of Manufacturing Industries in Developing Countries

In developing countries, there is an overwhelming challenge to diversify the economy from the primary sectors to more value adding and income generating sustainable secondary or manufacturing sectors. As global competitiveness intensifies, it is imperative that manufacturing organizations in developing countries can compete at a global level. This research focuses on Trinidad and Tobago (T&T) and the wider Caribbean region. However, its applicability and relevance is extensive. This paper investigates the manufacturing techniques/practices currently implemented in T&T with focus on companies that are compliant with quality and health and safety policies. This study advocates the need for a strategic approach for the successful implementation of world-class manufacturing (WCM) techniques/practices in T&T manufacturing industry. The methodology as well as research instruments developed and used are presented.

Keywords

  • Manufacturing Performance
  • World-class Manufacturing
  • Trinidad and Tobago
  • Health and Safety
  • ISO 9000
Open Access

Entomopter Maneuverability Exchanged by Deformations Control of Flexible Flapping Wings

Published Online: 18 May 2009
Page range: 93 - 102

Abstract

Entomopter Maneuverability Exchanged by Deformations Control of Flexible Flapping Wings

In the background of preparing this paper lies our believe that transferring ideas from the more matured disciple like aircraft technology to emerging animal technology should be beneficial for the later one and vice-versa. One integrated idea, of special interest to both disciplines, is the active flexible wing concept. In this paper we developed aeroelastic analysis for a flexible wing for an imposed harmonic flapping motion about the root chord of the wing. A Matlab code was written based on the analysis. This code was used to find the average lift and thrust of a wing of known aerodynamic and structural properties.

Keywords

  • Flapping wings Micro Aerial Vehicles (MAV)
  • aeroelastic analysis
  • Entomopter flight dynamics and control
Open Access

Engineering System Reliability State Identification Methodology

Published Online: 18 May 2009
Page range: 103 - 112

Abstract

Engineering System Reliability State Identification Methodology

In the process of investigating physical aspects of failures there is a need for measuring various features of objects. For this purpose measuring system, which consists of: operator - measuring instrument was used. In the paper an attempt of determining affectivity of such system was done. Influence of the first and second type errors on affectivity of the measuring system was considered. It was also shown how to decrease these errors. Influence on the affectivity of the reliability measurement of the measuring instrument was analyzed. Graduate and immediate failures were considered. Then some final conclusions were formulated.

Keywords

  • identification of the system technical state
  • reliability
  • measurement errors
Open Access

Automated Guided Vehicles (AGV): Searching a Path in the Flexible Manufacturing Systems

Published Online: 18 May 2009
Page range: 113 - 124

Abstract

Automated Guided Vehicles (AGV): Searching a Path in the Flexible Manufacturing Systems

Manufacturing systems are undergoing a noticeable evolution due to an intense technological progress in industrial robotics. Serial production has evolved into the concept of Flexible Manufacturing Systems (FMS), which encapsulate processes in automatic equipment that are capable of executing different operations, that before be performed in several stages and diverse equipments. Automated Guided Vehicle (AGV) systems have been frequently used as material handling equipment in manufacturing systems since the last two decades. Particularly, AGV's with trailers are, and will continue to be, the backbone of the material transport industry. The use of these systems has taken the attention of experts and researchers. They are numerous studies concerning AGV with trailers systems in literature; few of them deal with the adaptation of these systems into FMS. In this paper, a study of the trajectories and a simulation model of a hypothetical system, which included a FMS environment, were developed. In addition, a potential field's method was explored in order to improve the ability of detecting obstacles in AGV's with trailers moving through stations.

Keywords

  • Flexible Manufacturing Systems
  • Automated Guided Vehicle
  • Trajectories Planning
Open Access

Chosen Problems of Road Accidents Analyses in Poland

Published Online: 18 May 2009
Page range: 125 - 134

Abstract

Chosen Problems of Road Accidents Analyses in Poland

This article offers classification of car collisions from the point of view of the most frequent accidents and crash tests. The most important problems are the consequences of incomplete control of a car. The article focuses on the safety of road traffic in Poland and presents an attempt to analyze the causes of most frequent collisions and their consequences. It gives statistical data and attempts to analyze the level of road traffic safety. Some important indicators are shown here to compare the situation in France and Poland, which enabled verification of some opinions about road traffic safety in Poland.

Keywords

  • road accident
  • safety
  • statistical data
Open Access

Design of Reconfigurable Machine Systems: Knowledge Based Approach

Published Online: 18 May 2009
Page range: 135 - 144

Abstract

Design of Reconfigurable Machine Systems: Knowledge Based Approach

The Reconfigurable Manufacturing System (RMS) offers a flexible, changeable and dynamic manufacturing platform which is complex. The RMS evolved from the necessity to satisfy the markets highly customised demands. As the requirements of the customers vary the manufacturing system will need continuous and timely reconfigurations. A Knowledge Based System (KBS) is therefore the critical link in the module selection from a database to configure a machine. Modules will be selected to be timeously assembled into machine tools to manufacture customised goods with minimal disruptions to satisfy customer delivery times.

This paper will review the issues surrounding KBS software and their characteristics, as the appropriateness and requisite for establishing an RMS knowledge based system application is explored. Basic machine tree structures for the KBS application are also presented and discussed.

Keywords

  • Knowledge Based Systems
  • Reconfigurable Machine Tool
Open Access

Knowledge-Based Collaborative Lean Manufacturing Management (KBCLMM) System

Published Online: 18 May 2009
Page range: 145 - 156

Abstract

Knowledge-Based Collaborative Lean Manufacturing Management (KBCLMM) System

The objective of this research paper is to demonstrate the application of hybrid Knowledge-Based System, Gauging Absences of Pre-Requisites (GAP), and Analytic Hierarchy Process (AHP) approaches for selecting the improvement programs for Collaborative Lean Manufacturing Management (CLMM) System. In this research, a generic Knowledge-Based System is developed to measure the level of CLMM adoption in automotive manufacturers compared to the ideal system. Using the embedded GAP and AHP technique, the key lean manufacturing improvement programs can be prioritised by using both qualitative and quantitative criteria. The analysis covers the planning stage of the KBCLMM. The utilisation of the approach is demonstrated with an illustrative example.

Keywords

  • Analytic Hierarchy Process (AHP)
  • lean manufacturing
  • Knowledge-Based System (KBS)
  • Gauging Absences of Pre-Requisites (GAP)
Open Access

Preventive Maintenance with Imperfect Repairs of a System with Redundant Objects

Published Online: 18 May 2009
Page range: 157 - 170

Abstract

Preventive Maintenance with Imperfect Repairs of a System with Redundant Objects

An object ability to realise tasks may be restored by repairing only failed components. This is called imperfect repair, as the object is not as good as new after such a repair. Preventive replacement is an example of imperfect repair as well. The advantage of such maintenance is that it enables controlling a reliability level of a system. Sets of objects' components that should be replaced are derived on a basis of statistical diagnosing with use of data about components failures. The acceptable level of a failure risk while executing transportation tasks has been taken as a criterion of choosing elements to be replaced. An algorithm of selecting components for preventive replacement has been developed. It was shown that a level of system reliability could be controlled by changing an order of a quintile function in coordination and a number of redundant objects. A computer simulation model of the system was used to illustrate derived dependencies.

Keywords

  • Preventive maintenance
  • imperfect repair
  • statistical diagnosis
  • redundancy
Open Access

The Man - Machine Type Systems Modeling Approach

Published Online: 18 May 2009
Page range: 171 - 188

Abstract

The Man - Machine Type Systems Modeling Approach

The subject of this paper deals with selected usable characteristics of man - machine systems described by the selected basic attributes. The paper is describing also major objectives of safety engineering, based on the system approach, understanding the structure of safety management system, including the human factor, and all interrelationships between the system components. The part of the paper is example of safety engineering implementations in practice.

Keywords

  • man-machine set
  • availability
  • safety
  • reliability
Open Access

Human Reliability Model

Published Online: 18 May 2009
Page range: 189 - 200

Abstract

Human Reliability Model

The paper is focusing on reliability model of transport devices' human operator. The presented operator model is base on operation potential approach, with taken into account his features and states helping assure of safety decision-making process. The human reliability model is important for future improvement the human - machine interfaces (HMI).

Keywords

  • Human
  • reliability
  • transportation
Open Access

The Effect of Sales Smoothing on Inventory Performance

Published Online: 18 May 2009
Page range: 201 - 210

Abstract

The Effect of Sales Smoothing on Inventory Performance

This paper outlines z transform methods used to describe control of an inventory system. It examines how the form of the sales smoothing function affects the performance and sensitivity of the system to smoothing transfer functions. Graphical output from the Simulink package used the equations developed for an AIOBPCS inventory system. The analysis using sensitivity functions illustrates the frequency range over which the system is sensitive to the sales smoothing. For practical exponential smoothing this sensitive frequency window is in the range of weekly variations. The results presented here illustrate that the control-theoretic models show how sensitive the inventory is to sales smoothing. Replacing the traditional moving average technique with one based on control theory results in much lower stockout.

Keywords

  • Vendor-Managed-Inventory
  • discrete-simulation
  • sales smoothing
  • sensitivity
Open Access

Dangerous Goods Transportation: New Technologies and Reducing of the Accidents

Published Online: 18 May 2009
Page range: 211 - 222

Abstract

Dangerous Goods Transportation: New Technologies and Reducing of the Accidents

This article examines types of modern technologies application possibilities in dangerous goods transportation. It is noted that the solution to transport technology problems is based on the improvement of technological supply, the rational usage of informational modeling methodology of the whole transportation process. The article points out the ways of reducing the risk of possible damage and probability of accident. The conditions of ensure safe transportation of dangerous goods, managing and minimising risk on carriage of such goods along the whole route are introduced. The aspects of mobile solution of transport are named in this paper too.

Keywords

  • dangerous goods
  • risk
  • transport
Open Access

Rbf Neural Networks for Function Approximation in Dynamic Modelling

Published Online: 18 May 2009
Page range: 223 - 232

Abstract

Rbf Neural Networks for Function Approximation in Dynamic Modelling

The paper demonstrates the comparison of Monte Carlo simulation algorithm with neural network enhancement in the reliability case study. With regard to process dynamics, we attempt to evaluate the tank system unreliability related to the initiative input parameters setting. The neural network is used in equation coefficients calculation, which is executed in each transient state. Due to the neural networks, for some of the initial component settings we can achieve the results of computation faster than in classical way of coefficients calculating and substituting into the equation.

Keywords

  • reliability
  • Monte Carlo
  • Radial Basis Function (RBF)
Open Access

Aging Processes as a Primary Aspect of Predicting Reliability and Life of Aeronautical Hardware

Published Online: 18 May 2009
Page range: 233 - 240

Abstract

Aging Processes as a Primary Aspect of Predicting Reliability and Life of Aeronautical Hardware

The forecasting of reliability and life of aeronautical hardware requires recognition of many and various destructive processes that deteriorate the health/maintenance status thereof. The aging of technical components of aircraft as an armament system proves of outstanding significance to reliability and safety of the whole system. The aging process is usually induced by many and various factors, just to mention mechanical, biological, climatic, or chemical ones. The aging is an irreversible process and considerably affects (i.e. Reduces) reliability and life of aeronautical equipment.

Keywords

  • aircraft
  • durability
  • reliability
Open Access

Assessment of the Level of Undesirable Actions of People Involved in Road Transport Systems and their Environments.

Published Online: 18 May 2009
Page range: 241 - 248

Abstract

Assessment of the Level of Undesirable Actions of People Involved in Road Transport Systems and their Environments.

Road transport systems are socio-technical systems of the type Human - Technical object- Environment <H-TO-E>. In these systems hazards can be caused by: the man C, the technical object OT, and influence of the environment on the technical object and people who are present in the system and its environment. The authors of the paper make an attempt to evaluate the level of threats resulting from intended or not intended actions of people situated in this environment.

Keywords

  • social engineering system
  • safety working
Open Access

Markov Model of the Transport Devices Exploitation Process

Published Online: 18 May 2009
Page range: 249 - 260

Abstract

Markov Model of the Transport Devices Exploitation Process

The article presents the model of transport means operation and maintenance process, realized within a system of urban bus transport. On the basis of identification of the investigated system and the realized in it process, a mathematical model of the operation and ensuring efficiency processes was built, assuming that models of these processes are homogenous Markov processes. On this bases an analysis of the considered controlled process had been made. All the considerations are presented on the example of a chosen real system of operation and maintenance of means of transport.

Keywords

  • transport system
  • exploitation process

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